Tabbed Pipe Coupling Retainers for Correct Assembly Orientation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing pipe couplings for plain end pipe elements lack a mechanism to ensure proper orientation of retainers, which is crucial for self-actuation and secure mechanical engagement, making it difficult to determine if the retainers are correctly oriented during assembly, leading to potential leakage and mechanical failure under pressure.
Innovation Solution
The coupling design includes channels with differently curved floors and angularly oriented teeth and tabs that allow proper orientation verification through apertures, preventing pipe element insertion if retainers are misaligned, ensuring self-actuation and secure engagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If retainers are used with angularly oriented teeth for self-actuating mechanical engagement, then mechanical restraint and secure coupling are improved, but the ability to determine proper retainer orientation during assembly deteriorates
Solution Approach 1:
The patent applies visual indicators (such as colored bands or markings on the retainer and corresponding indicators on the pipe element) that change or align to show proper orientation. When the retainer is correctly positioned, the visual indicators align or display a specific color pattern, providing immediate feedback to the assembler about proper orientation without requiring complex measurement tools.
Solution Approach 2:
The patent incorporates asymmetric features on the retainer and pipe element that only fit together in the correct orientation. These asymmetric elements (such as non-circular cross-sections, positioned protrusions, or keyed interfaces) physically prevent improper installation while providing clear visual and tactile cues about the correct retainer orientation during assembly.
2Ease of operation
If retainers are improperly oriented during assembly, then ease of installation is improved, but mechanical engagement strength and leakage prevention deteriorate
Solution Approach 1:
The patent incorporates features that preemptively prevent improper retainer orientation before installation is completed. The design includes elements such as asymmetric keyways, positioned tabs, or visual indicators that guide the assembler to install the retainer in the correct orientation from the start, eliminating the possibility of improper installation rather than detecting it afterward.
Solution Approach 2:
The patent uses asymmetric geometric features on both the retainer and pipe element that only permit assembly in the correct orientation. These asymmetric elements create a mechanical guide system where the retainer can only be installed properly, ensuring both ease of correct installation and strong mechanical engagement without requiring additional verification steps.
Data Source
AI summary
A pipe coupling for plain end pipe is formed of segments joined end to end surrounding a central space. The segments are connected end to end by lugs on each segment with fasteners extending between them. Each segment has channels on opposite sides that face the central space with floors at different radii. Retainers are received within the channels. The retainers have teeth and one or more offset tabs that cooperate with the channels to prevent improper assembly. A ring seal is received within a channel positioned in each segment between the retainer channels.